But the Israeli ambassador to the UK, Mark Regev, this morning defended the use of force as "measured" and "surgical". "We would have come to this protest today anyway, but now we're even more amped up and I'm personally going to use this energy and sadness for activism".
Yildirim said after Friday's summit a giant rally would be held at the vast Yenikapi meeting area in Istanbul under the slogan of "Stop the Oppression" to express solidarity with the Palestinians.
Like nearly all other nations, and especially most of its Western allies, Britain disagrees with US President Donald Trump's decision to move the US Embassy from Tel Aviv.
"We believe the realistic outcome of that would be and should be that Jerusalem being the capital both of the state Israel and the State of Palestine", she said.
The council met after the bloodiest day for Palestinians since a 2014 Gaza war. It's for you Irish people to raise your voice and say, "no enough is enough".
At Ben-Gurion University in Be'er Sheva, over 100 people, mostly Arab students but also including 20-or-so Jews, held a spontaneous demonstration.
Israel and the US blamed Hamas, which rules Gaza, for the deaths, saying that Israel was defending its border.
Wanton killings on Gaza border by Israeli forces have drawn worldwide condemnation with the US Security Council meeting to discuss the Middle East situation.
Palestinians, who view the eastern part of Jerusalem as the capital of a future Palestinian state, were demonstrating against the opening of the new U.S. Embassy.
"This step represents a significant prejudice against the rights of the Palestinian people which have been guaranteed by global resolutions", it said.
"It is unthinkable that while people are drinking champagne in Jerusalem, others are dying in Gaza", Noga Malkin, an activist with the left-wing movement Standing Together, said to the crowd.
Hundreds of pro-Palestinian demonstrators gathered outside San Francisco's Israeli Consulate on Tuesday to protest U.S. support for Israel, the moving of the U.S. Embassy to Jerusalem - which Israel views as its capitol - and the violence and death that resulted from that.